The Smiler is a steel roller coaster located at Alton Towers in Staffordshire, United Kingdom. Manufactured by Gerstlauer, it features 14 inversions and holds the world record for most inversions on a roller coaster. The Smiler has suffered a series of setbacks and ride incidents including a malfunction at a press preview event which delayed the official opening date to 31 May 2013. On 2 June 2015, two of the ride's trains collided leaving five riders seriously injured.